CAJ | 학술논문

利用微波对共沉淀制备的铁铈钛复合氧化物催化剂前驱体进行水热处理,探讨了微波水热处理对铁基催化剂低温 SCR 脱硝性能的优化；并对微波水热处理条件的影响进行了正交分析。结果表明：对铁基催化剂前驱体进行微波水热处理,可提高其低温 SCR 脱硝性能,使其脱硝温度窗口向低温偏移；且微波水热处理的低温优化效果与催化剂中Fe/Ti摩尔比密切相关,Fe/Ti摩尔比越小,微波水热处理的低温优化越强；微波加热方式和微波辐射时间会影响微波水热处理对铁基催化剂SCR脱硝性能的低温优化；在相同微波辐射时间条件下,当P30逐渐变为P80,微波水热处理对铁基催化剂低温SCR脱硝的促进作用降低；在P30条件下,微波辐射15min使铁基催化剂具有最佳低温SCR脱硝活性。
이용미파대공침정제비적철시태복합양화물최화제전구체진행수열처리,탐토료미파수열처리대철기최화제저온 SCR 탈초성능적우화；병대미파수열처리조건적영향진행료정교분석。결과표명：대철기최화제전구체진행미파수열처리,가제고기저온 SCR 탈초성능,사기탈초온도창구향저온편이；차미파수열처리적저온우화효과여최화제중Fe/Ti마이비밀절상관,Fe/Ti마이비월소,미파수열처리적저온우화월강；미파가열방식화미파복사시간회영향미파수열처리대철기최화제SCR탈초성능적저온우화；재상동미파복사시간조건하,당P30축점변위P80,미파수열처리대철기최화제저온SCR탈초적촉진작용강저；재P30조건하,미파복사15min사철기최화제구유최가저온SCR탈초활성。
Microwave was used to hydrothermally treat the precursors of iron-cerium-titanium mixed oxide catalysts prepared by co-precipitation.The optimization of microwave hydrothermal treatment on the low-temperature NH3-SCR activity over iron-based catalyst were investigated in a fixed-bed quartz tube reactor,and the influences of microwave hydrothermal treatment conditions were also studied through the orthogonal experiment.The results indicated that microwave hydrothermal treatment could improved the low-temperature NH3-SCR activity of iron-based catalyst,and made its reactive SCR temperature window shift to the low-temperature region.Meanwhile,the promotional effect of microwave hydrothermal treatment on low-temperature NH3-SCR activity is closely related to the molar ratio of Fe and Ti in the mixed oxide catalyst.When the molar ratio of Fe and Ti is smaller,the promotion of microwave hydrothermal treatment is higher.The microwave heating method and the microwave radiation time played an important role on the promotion of low-temperature NH3-SCR activity over iron-based catalyst.Under the same microwave radiation time,when the microwave heating method was changed from P30to P80,the promotion of microwave hydrothermal treatment on low-temperature NH3-SCR activity over iron-based catalyst gradually decreased.Under the condition of P30,iron-based catalyst showed the highest NH3-SCR activity after being treated by microwave radiation for 15min.